Sensor for monitoring electroencephalogram signal and brain oxygen information

Abstract

The utility model discloses a sensor for monitoring electroencephalogram signals and brain oxygen information, which comprises a brain oxygen information monitoring structure and an electroencephalogram information monitoring structure. The brain oxygen information monitoring structure comprises a first brain oxygen sensor, a second brain oxygen sensor and a brain oxygen information output port. The electroencephalogram information monitoring structure comprises a first electroencephalogram electrode arranged at the frontal position between the first brain oxygen sensor and the second brain oxygen sensor, a first connecting line arranged on the first electroencephalogram electrode, and a second electroencephalogram electrode arranged at the end of the first connecting line corresponding to the temporal position. The second electroencephalogram electrode is respectively provided with a second section of connecting line and a third section of connecting line which are mutually branched, a third electroencephalogram electrode is arranged on the end part of the second section of connecting line corresponding to the position of the ear protrusion, and an electroencephalogram signal output port is arranged on the third section of connecting line. The brain oxygen information and the electroencephalogram signals can be monitored at the same time, and the electroencephalogram signal collecting quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of surgical anesthesia equipment, in particular to a sensor for monitoring brain electrical signals and brain oxygen information. Background Art

[0002] Anesthetic sedatives can put patients in an unconscious and amnesic state. Intraoperative awareness refers to the state in which patients under general anesthesia become conscious during surgery and can recall events related to the surgery after surgery. Intraoperative awareness is a serious surgical anesthesia accident that will bring extremely painful subjective experience to patients and may have long-term adverse effects. At present, the mechanism of intraoperative awareness has not been clarified, and insufficient depth of anesthesia is one of the main causes of intraoperative awareness. Therefore, collecting scalp EEG signals of patients, judging the depth of anesthesia of patients based on EEG characteristics, and avoiding too shallow anesthesia are the main means to reduce the risk of intraoperative awareness. In addition, although patients under general anesthesia are unconscious, their brains are still working and still need oxygen. The decrease in local brain oxygen saturation caused by insufficient oxygen perfusion of brain tissue during the perioperative period is closely related to various neurological complications such as postoperative delirium, delayed neurocognitive recovery, and stroke in patients after surgery. Therefore, monitoring brain oxygen information during surgery and taking effective measures in a timely manner based on the collected information are of great significance for improving the success rate of surgery. There is a method of monitoring brain oxygen information during surgery, which is to use a brain oxygen sensor and an EEG sensor to fit the patient's head separately, so that EEG signals and brain oxygen information can be monitored at the same time, but two consumables are required, and the workload of the operator is increased; mainly because different consumables are independent of each other and need to be repeatedly positioned and fitted. In addition, there is also a method of monitoring brain oxygen information during surgery, which is to use a brain computer oxygen composite probe. The brain oxygen and EEG functional tests of the brain computer oxygen composite probe can be completed in one test. Although this method can realize the simultaneous monitoring of EEG signals and brain oxygen information with a single consumable, the brain oxygen monitoring of the consumable is a dual interface, which is inconvenient for monitoring the changes in the patient's position during surgery. At the same time, the EEG monitoring signal area is concentrated in the forehead area, and the information obtained by collecting signals is limited. The surgical patient is affected by the type of surgery, and his intraoperative position is not limited to the supine position, but also prone position, lateral position and other positions. The dual interface of brain oxygen monitoring is prone to interface extrusion and bending during the change of position, or causes pressure sores and signal transmission quality degradation in patients during long-term surgery. The EEG electrodes only monitor the forehead and can only obtain signals from the front area of ​​the brain, reducing the monitoring of the ear protrusions and temporal parts. Its EEG monitoring range lacks areas such as the frontal lobe, temporal lobe and occipital lobe, which is not conducive to a more comprehensive understanding of the brain's EEG activity. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a sensor for monitoring brain oxygen information and brain electroencephalogram signals at the same time, thereby improving the quality of brain electroencephalogram signal acquisition.

[0004] To achieve the above-mentioned purpose, the utility model provides a sensor for monitoring EEG signals and brain oxygen information, which includes a brain oxygen information monitoring structure and an EEG information monitoring structure connected to the brain oxygen information monitoring structure. The brain oxygen information monitoring structure includes a first brain oxygen sensor and a second brain oxygen sensor that are respectively arranged on both sides of the patient's forehead midline and are connected to each other, and a brain oxygen information output port provided on the first brain oxygen sensor or the second brain oxygen sensor. The EEG information monitoring structure includes a first EEG electrode provided at a forehead position between the first brain oxygen sensor and the second brain oxygen sensor, a first section of connecting wire provided on the first EEG electrode, a second EEG electrode provided at the end of the first section of connecting wire corresponding to the temporal position, a second section of connecting wire and a third section of connecting wire that are bifurcated from each other are respectively arranged on the second EEG electrode, a third EEG electrode is provided at the end of the second section of connecting wire corresponding to the ear protrusion position, and an EEG signal output port is provided on the third section of connecting wire.

[0005] In some embodiments, the first brain oxygen sensor and the second brain oxygen sensor each include, from bottom to top, a first flexible circuit board, a white foam layer, a black foam layer, a circuit board, and a gel layer. A brain oxygen module is disposed on the circuit board.

[0006] In some embodiments, the first EEG electrode or the second EEG electrode or the third EEG electrode includes a second flexible circuit board, a double-sided tape provided on the second flexible circuit board, a single-sided foam layer provided on the double-sided tape, a hollow recess provided in the hollow position of the second flexible circuit board, and a double-sided foam layer, a hook sticker and a low-density sponge layer provided in sequence from bottom to top on the second flexible circuit board in the hollow recess.

[0007] In some embodiments, the brain oxygen information output port is a single-channel information output.

[0008] In some embodiments, the EEG signal output port is a single-channel output of information.

[0009] The beneficial effect of the utility model is that it can monitor brain oxygen information and EEG signals at the same time, and improve the quality of EEG signal acquisition. After the improvement, two types of brain data are collected, and the EEG monitoring points are the forehead, temporal part, and ear protrusion. It can monitor a wide range of brain EEG areas such as the forehead, frontal lobe, temporal lobe and occipital lobe, and realize the monitoring of left and right brain oxygen and information acquisition with a single interface and dual channels, and realize the effect of monitoring brain oxygen information and EEG signals at the same time. After the EEG electrode is positioned, the position of the brain oxygen sensor is relatively determined, avoiding secondary positioning and bonding; the single-channel output of brain oxygen information avoids the influence of the patient's body position; the EEG electrodes measure the positions of the forehead, temporal part, and ear protrusion respectively, and improve the quality of EEG signal acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the EEG information monitoring structure in the utility model;

[0012] Figure 3 It is a structural schematic diagram of the brain oxygen information monitoring structure of the utility model. DETAILED DESCRIPTION

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] like Figure 1-3As shown, a sensor for monitoring EEG signals and brain oxygen information includes a brain oxygen information monitoring structure 01 and a brain oxygen information monitoring structure 02 connected to the brain oxygen information monitoring structure 01. The brain oxygen information monitoring structure 01 includes a first brain oxygen sensor 11 and a second brain oxygen sensor 12, which are respectively provided on both sides of the forehead midline of the patient's head and obliquely cross the forehead midline and are connected to each other, and a brain oxygen information output port 13 provided on the first brain oxygen sensor 11 or the second brain oxygen sensor 12. The first brain oxygen sensor 11 and the second brain oxygen sensor 12 cannot cross the forehead midline, but can only cross the forehead midline obliquely. The EEG information monitoring structure 02 includes a first EEG electrode 21 provided at the forehead position between the first brain oxygen sensor 11 and the second brain oxygen sensor 12, a first section of connecting wire 22 provided on the first EEG electrode 21, a second EEG electrode 23 provided at the end of the first section of connecting wire 22 at the corresponding temporal position, a second section of connecting wire 24 and a third section of connecting wire 25 bifurcated from each other provided on the second EEG electrode 23, a third EEG electrode 26 provided at the end of the second section of connecting wire at the corresponding ear protrusion position, and an EEG signal output port 27 provided on the third section of connecting wire 25. The first brain oxygen sensor 11 and the second brain oxygen sensor 12 each include, from bottom to top, a first flexible circuit board 111, a white foam layer 112, a black foam layer 113, a circuit board 114, and a gel layer 115. A brain oxygen module 116 is provided on the circuit board. The first EEG electrode 21 or the second EEG electrode 23 or the third EEG electrode all include a second flexible circuit board 211, a double-sided adhesive tape 212 provided on the second flexible circuit board 211, a single-sided foam layer 213 provided on the double-sided adhesive tape 212, a hollow recess 214 provided in the hollow position of the second flexible circuit board 211, and a double-sided foam layer 215, a hook sticker 216 and a low-density sponge layer 217 provided in sequence from bottom to top on the second flexible circuit board 211 in the hollow recess 214. The brain oxygen information output port 13 is a single-channel information output. The EEG signal output port 27 is a single-channel information output.

[0015] When in use, after the EEG electrodes are positioned, the position of the brain oxygen sensor is relatively certain, avoiding secondary positioning and bonding; the brain oxygen information is output in a single channel to avoid the influence of the patient's body position; the EEG electrodes measure the frontal, temporal, and ear protrusion positions respectively, improving the quality of EEG signal acquisition. In this way, the collection of two types of brain data is achieved, and the EEG monitoring points are the frontal, temporal, and ear protrusions. It can monitor a wide range of brain EEG areas such as the forehead, frontal lobe, temporal lobe, and occipital lobe, while realizing single-interface dual-channel left and right brain oxygen monitoring.

[0016] Application examples: EEG monitoring uses EEG electrodes to collect EEG signals from the forehead, temporal area, and auricular protrusions. Based on the signal value analysis, the four sub-parameters of α rat io, β rat io, β rat i o-α rat io, and burst-rat io in the EEG are calculated. The adaptive fuzzy neural inference system is used for calculation to output the anesthesia depth index CSI (Cerebral state index), frontal electromyography EMG, and burst suppression ratio BS%. Brain oxygen monitoring uses near-infrared light signals, optical signal transmitting sensors and optical signal receiving sensors, and utilizes the different absorption spectra of different proteins in human tissues. By detecting the absorption attenuation of the emitted light on the corresponding spectrum, the Beer-Lambert law and diffuse reflection correction are used to calculate the local blood oxygen concentration in the brain and obtain the rSO2% value.

[0017] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A sensor for monitoring EEG signals and brain oxygen information, characterized in that: It includes a brain oxygen information monitoring structure and an electroencephalogram information monitoring structure connected to the brain oxygen information monitoring structure; The brain oxygen information monitoring structure includes a first brain oxygen sensor and a second brain oxygen sensor which are respectively arranged on both sides of the forehead midline of the patient's head and are connected to each other, and a brain oxygen information output port is arranged on the first brain oxygen sensor or the second brain oxygen sensor; The EEG information monitoring structure includes a first EEG electrode provided at a forehead position between a first brain oxygen sensor and a second brain oxygen sensor, a first connecting line provided on the first EEG electrode, a second EEG electrode provided at the end of the first connecting line at a corresponding temporal position, a second connecting line and a third connecting line forked from each other provided on the second EEG electrode, a third EEG electrode provided at the end of the second connecting line at a corresponding ear protrusion position, and an EEG signal output port provided on the third connecting line.

2. A sensor for monitoring EEG signals and brain oxygen information according to claim 1, characterized in that: The first brain oxygen sensor and the second brain oxygen sensor each include, from bottom to top, a first flexible circuit board, a white foam layer, a black foam layer, a circuit board and a gel layer; A brain oxygen module is arranged on the circuit board.

3. A sensor for monitoring EEG signals and brain oxygen information according to claim 1, characterized in that: The first EEG electrode, the second EEG electrode, or the third EEG electrode all include a second flexible circuit board, a double-sided tape provided on the second flexible circuit board, a single-sided foam layer provided on the double-sided tape, a hollow recess provided in the hollow position of the second flexible circuit board, and a double-sided foam layer, a hook sticker, and a low-density sponge layer provided in sequence from bottom to top on the second flexible circuit board in the hollow recess.

4. A sensor for monitoring EEG signals and brain oxygen information according to claim 1, characterized in that: The brain oxygen information output port is a single-channel information output.

5. The sensor for monitoring EEG signals and brain oxygen information according to claim 1, characterized in that: The EEG signal output port is a single-channel information output.

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